CN113285466B - Coordination control method for reactive voltage - Google Patents

Coordination control method for reactive voltage Download PDF

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CN113285466B
CN113285466B CN202110460857.1A CN202110460857A CN113285466B CN 113285466 B CN113285466 B CN 113285466B CN 202110460857 A CN202110460857 A CN 202110460857A CN 113285466 B CN113285466 B CN 113285466B
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voltage
reactive
operation information
reactive voltage
feeder line
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CN113285466A (en
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王树彪
张昊亮
梁晟杰
陈满
赵浩君
刘思嘉
吴昊
邢益斌
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Nanjing Power Supply Co of State Grid Jiangsu Electric Power Co Ltd
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Nanjing Power Supply Co of State Grid Jiangsu Electric Power Co Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
    • H02J3/16—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by adjustment of reactive power
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/16—Electric power substations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications

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  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

The invention discloses a coordination control method of reactive voltage, which comprises the steps of collecting operation information of reactive voltage equipment at a distribution area side through a monitoring terminal of a distribution transformer, and uploading the operation information to an automatic four-area master station of a distribution network; the method comprises the steps that operation information of reactive voltage equipment on a feeder side is collected through a feeder automatic voltage reactive control device, and the operation information is uploaded to a four-area automatic main station of a power distribution network; calculating an optimized value of the bus voltage based on the operation information; calculating a reactive voltage optimization target value of the feeder line based on the data of the feeder line area and by combining load prediction and the comprehensive qualification rate of the area below the feeder line; a coordination controller is designed according to the optimized value and the optimized target value of the reactive voltage, so that the coordination control of the reactive voltage is realized; the invention designs the power voltage coordination controller by combining the reactive voltage equipment and the automatic voltage reactive power control technology, so that the voltage quality is effectively improved, the reactive power transmission is reduced, and the voltage stability margin is increased.

Description

Coordination control method for reactive voltage
Technical Field
The invention relates to the technical field of voltage optimization control, in particular to a reactive voltage coordination control method.
Background
With the expansion of the scale of the power grid and the improvement of the automation level of dispatching, the requirement of driving the power grid is difficult to meet by only depending on manual control, and a series of automatic control implemented by building an automatic control system in each control center is known. Taking Automatic Voltage Control (AVC) as an example, the AVC system takes a power grid in a control center as a control object, considers the operation constraint of the power grid in the control center, and takes reactive Voltage regulation equipment in the control center as a control means.
However, most of the existing automatic control systems are used for carrying out isolated adjustment on voltage and reactive power, the voltage and reactive power adjustment is not organically combined, the frequency of actions of voltage and reactive power adjustment equipment is too frequent, frequent adjustment causes frequent faults of a transformer, and power supply quality and stability are seriously influenced, so that the voltage and reactive power automatic control cannot be widely applied and popularized in actual work.
Disclosure of Invention
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and title of the application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.
The present invention has been made in view of the above-mentioned conventional problems.
Therefore, the invention provides the coordination control of the reactive voltage, which can improve the reactive regulation effect of the voltage and eliminate unreasonable reactive flow between power grids.
In order to solve the technical problems, the invention provides the following technical scheme: the method comprises the steps that a distribution transformer monitoring terminal is used for collecting operation information Q of reactive voltage equipment at a distribution station side, and the operation information is uploaded to a distribution network automation four-area main station through a mobile public network channel; acquiring operation information P of reactive voltage equipment at a feeder side through a feeder automatic voltage reactive power control device, and uploading the operation information P to the distribution network automation four-area master station through the mobile public network channel; calculating an optimized value of the bus voltage of the transformer substation based on the operation information Q and the operation information P; calculating a reactive voltage optimization target value of the feeder line based on data of all the transformer areas below the feeder line and by combining load prediction and comprehensive qualification rate of the transformer areas below the feeder line; and designing a coordination controller according to the optimized value and the reactive voltage optimized target value, and performing coordination control on the reactive voltage according to the coordination controller.
As a preferable aspect of the coordinated control method for reactive voltage according to the present invention, wherein: the step of collecting the operation information Q comprises the step of collecting the operation information Q of the reactive voltage equipment at the transformer area side by the distribution transformer monitoring terminal through a twisted pair and a DLT645 communication protocol.
As a preferable aspect of the coordinated control method for reactive voltage according to the present invention, wherein: the step of collecting the operation information P comprises the step of collecting the operation information P of the reactive voltage equipment at the transformer area side by the feeder line automatic voltage reactive power control device through the twisted pair.
Calculating the optimized value of the bus voltage of the transformer substation comprises the following steps of calculating the optimized value U of the bus voltage of the transformer substation based on the power distribution network data of the four-area main station by combining load prediction and the qualified rate of the power distribution network voltage:
Figure BDA0003042176160000021
wherein, UjIs the actual voltage of bus node j, UaFor the distribution network point voltage qualification rate, UjmaxFor maximum allowable deviation, n is the number of nodes.
As a preferable aspect of the coordinated control method of reactive voltage according to the present invention, wherein: calculating the reactive voltage optimization target value of the feeder line comprises the following steps of calculating a reactive voltage optimization target value V of the feeder line based on data of all the areas below the feeder line and by combining the load prediction and the comprehensive qualified rate of the area voltage below the feeder line:
Figure BDA0003042176160000022
Wherein, the comprehensive qualification rate of the station area voltage below the feeder line is represented by s as the turning frequency, and Q is the reactive power.
As a preferable aspect of the coordinated control method of reactive voltage according to the present invention, wherein: uploading the operation information comprises encrypting the operation information through a safety encryption chip and uploading the operation information through the mobile public network channel according to an IEC-104 standard communication protocol.
As a preferable aspect of the coordinated control method for reactive voltage according to the present invention, wherein: designing the coordinated controller may include designing the coordinated controller to include,
Figure BDA0003042176160000023
wherein, S (A, x) is the coordination controller, A is a block matrix, R is a positive definite matrix, x is input voltage, T is total reactive voltage monitoring time, and T is a transposition symbol.
As a preferable aspect of the coordinated control method of reactive voltage according to the present invention, wherein: further comprising, the coordinating controller satisfies the following equation:
S(A,x)≤xTQx。
the invention has the beneficial effects that: the invention designs the reactive voltage coordination controller for the reactive voltage by combining the reactive voltage equipment and the automatic voltage reactive power control technology, so that the voltage quality is effectively improved, the reactive transmission is reduced, and the voltage stability margin is increased.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor. Wherein:
fig. 1 is a schematic flowchart of a reactive voltage coordination control method according to a first embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanying figures of the present invention are described in detail below, and it is apparent that the described embodiments are a part, not all or all of the embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, shall fall within the protection scope of the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Furthermore, the references herein to "one embodiment" or "an embodiment" refer to a particular feature, structure, or characteristic that may be included in at least one implementation of the present invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
The present invention will be described in detail with reference to the drawings, wherein the cross-sectional views illustrating the structure of the device are not necessarily enlarged to scale, and are merely exemplary, which should not limit the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.
Also in the description of the present invention, it should be noted that the terms "upper, lower, inner and outer" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms first, second, or third are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The terms "mounted, connected" and "connected" in the present invention are to be construed broadly, unless otherwise explicitly specified or limited, for example: can be fixedly connected, detachably connected or integrally connected; they may be mechanically, electrically, or directly connected, or indirectly connected through intervening media, or may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
Example 1
Referring to fig. 1, a first embodiment of the present invention provides a method for coordinated control of reactive voltage, including:
s1: the operation information Q of the reactive voltage equipment at the transformer area side is collected through the distribution transformer monitoring terminal, and the operation information is uploaded to a distribution network automation four-area main station through a mobile public network channel.
It should be noted that a distribution Transformer monitoring Terminal (TTU) is used for collecting and controlling information of a distribution Transformer in a power supply and distribution system.
The distribution transformer monitoring terminal acquires operation information Q of reactive voltage equipment (an on-load tap changer, a reactive compensation device and the like) on the side of a transformer area through a twisted pair (RS485/RS232) and a DLT645/Modbus communication protocol.
The RS485 bus standard specifies the electrical characteristic standard of the bus interface, i.e. the definition of 2 logic states: the positive level is between +2V to +6V, which represents a logic state; the negative level is between-2V and-6V, and then represents another logic state; the digital signals adopt a differential transmission mode, so that the interference of noise signals can be effectively reduced. The RS232 bus defines 25 lines, including two signal paths, namely a first path (referred to as a main path) and a second path (referred to as a sub path); full-duplex communication can be realized by using an RS232 bus, a main channel is usually used, and a secondary channel is less used; in general applications, full-duplex communication can be realized by using 3 to 9 signal lines, and a simple full-duplex communication process can be realized by using three signal lines (a receiving line, a transmitting line and a signal ground).
Furthermore, the operation information is encrypted through a safety encryption chip uniformly deployed by the China department of Electrical sciences, and then the operation information Q of the reactive voltage equipment at the transformer area side is uploaded through an IP channel of the mobile public network according to an IEC-104 standard communication protocol.
S2: the method comprises the steps of collecting operation information P of reactive voltage equipment on a feeder side through a feeder automatic voltage reactive power control device, and uploading the operation information P to a distribution network automatic four-area main station through a mobile public network channel.
An Automatic Voltage reactive Control (AVQC) device of a feeder acquires operation information P of reactive Voltage equipment (a line Voltage regulator, a line reactive compensation device, etc.) at a station side through a twisted pair.
Furthermore, the operation information is encrypted through a safety encryption chip uniformly deployed by the China department of Electrical sciences, and then the operation information P of the reactive voltage equipment at the feeder line side is uploaded through a mobile public network channel according to an IEC-104 standard communication protocol.
S3: and calculating an optimized value of the bus voltage of the transformer substation based on the operation information Q and the operation information P.
Based on the power distribution network data of the four-area master station, the load prediction and the distribution network voltage qualification rate are combined, and the optimized value U of the bus voltage of the transformer substation is calculated:
Figure BDA0003042176160000051
it should be noted that, in the embodiment, load prediction is performed on the power system based on an SVM (Support Vector Machine); the SVM maps a sample space into a feature space (Hilbert space) of high dimension or infinite dimension through a nonlinear mapping p, so that the problem of nonlinear divisibility in the original sample space is converted into the problem of linear divisibility in the feature space.
In this embodiment, a kernel function of a two-layer neural network is selected to generate the SVM, and an expression of the kernel function of the two-layer neural network is as follows:
K(x,y)＝tanh(a(x·y)+b)
Load prediction of a power system is achieved by:
Figure BDA0003042176160000052
Figure BDA0003042176160000061
the distribution network voltage qualification rate is calculated by the following formula:
Figure BDA0003042176160000071
wherein, UjIs the actual voltage of bus node j, UaFor distribution network point voltage qualification rate, UjmaxIs the maximum allowable deviation, tmThe total time is monitored for the monthly voltage, the total time of the monthly voltage overrun is monitored, and n is the number of nodes.
Further, the optimized value U of the substation bus Voltage is sent to a main network AVC (Automatic Voltage Control).
S4: and calculating the reactive voltage optimization target value of the feeder line based on the data of all the transformer areas below the feeder line and by combining the load prediction and the comprehensive qualification rate of the transformer areas below the feeder line.
Calculating a reactive voltage optimization target value V of the feeder line based on data of all the areas below the feeder line and by combining load prediction and the comprehensive qualification rate of the area voltage below the feeder line:
Figure BDA0003042176160000072
wherein, for the comprehensive qualification rate of the platform area voltage below the feeder line, s is the turn frequency, and Q is the reactive power.
S5: and designing a coordination controller according to the optimized value and the reactive voltage optimized target value, and performing coordination control on the reactive voltage according to the coordination controller.
Designing a coordination controller according to the optimized value and the reactive voltage optimized target value and combining the power flow constraint condition, wherein the expression of the coordination controller S (A, x) is as follows:
Figure BDA0003042176160000073
And the coordination controller satisfies the following equation:
S(A,x)≤xTQx。
wherein A is a block matrix, R is a positive definite matrix of m orders, x is input voltage, T is total reactive voltage monitoring time, and T is a transposed symbol.
The expression of the block matrix a is as follows:
Figure BDA0003042176160000074
the power flow constraint conditions are as follows:
Figure BDA0003042176160000081
Figure BDA0003042176160000082
where V is the node voltage, Ω (i) is the set of nodes connected to node i,
Figure BDA0003042176160000083
for the active power at node i at time t,
Figure BDA0003042176160000084
is the reactive power at node i at time t, Pi DG.tActive power, P, of the distributed power supply for node i at time ti D.tActive power consumed by distributed power loads of node i at time t, Pi DR.tThe distributed power supply at node i for time t needs active power to participate in voltage reactive power optimization,
Figure BDA0003042176160000085
for the reactive power of the distributed power supply at node i at time t,
Figure BDA0003042176160000086
for the reactive power consumed by the distributed power load at node i at time t,
Figure BDA0003042176160000087
reactive power, P, required to participate in reactive voltage optimization for distributed power supplies at node i at time ti SVG.tSVG reactive compensation power P of distributed power supply for node i at time ti CB.tAnd the reactive compensation power of the capacitor bank at the node i at the time t is obtained.
The constraint conditions that the active power and the reactive power of the distributed power supply should meet are as follows:
Figure BDA0003042176160000088
wherein, Pi DG.tFor the actual active power output of the distributed power supply at node i at time t,
Figure BDA0003042176160000089
For the actual reactive power contribution of the distributed power supply at node i at time t,
Figure BDA00030421761600000810
the maximum active power output of the distributed power supply of the node i at the time t.
In the process of operation and scheduling of the power distribution network, the Static VaR Generator (SVG) is used as a continuous decision variable, and the operation constraint conditions to be met are as follows:
Figure BDA00030421761600000811
wherein, the first and the second end of the pipe are connected with each other,
Figure BDA00030421761600000812
for the reactive power of the static var generator in node i at time t,
Figure BDA00030421761600000813
is the maximum value of the reactive power of the static var generator in node i,
Figure BDA00030421761600000814
is the minimum value of the reactive power of the static var generator in the node i.
The capacitor bank is used as a discrete decision variable in the process of operation scheduling of the power distribution network, the operation times of the capacitor bank in a scheduling period are strictly limited, each switching operation is a group operation, and the operation of the capacitor bank should meet the following constraint conditions:
Figure BDA0003042176160000091
wherein, the first and the second end of the pipe are connected with each other,
Figure BDA0003042176160000092
the reactive power of the capacitor bank at node i at time t,
Figure BDA0003042176160000093
for the reactive compensation power of the capacitor bank,
Figure BDA0003042176160000094
for the number of capacitor banks in node i on time t,
Figure BDA0003042176160000095
the maximum number of capacitor banks to be put into operation.
Example 2
In order to verify and explain the technical effect adopted in the method, the independent control method selected in the embodiment and the method adopted in the embodiment are used for comparison test, and the test results are compared by means of scientific demonstration to verify the real effect of the method.
The independent control method is relatively balanced in control of reactive voltage, but the reactive transmission times of the tie line are relatively frequent, and although the system network loss is reduced, the effect is not obvious.
In order to verify that the relatively independent control method of the method has a better optimization effect on the reactive voltage, in this embodiment, the independent control method and the method are respectively used for performing simulation control comparison on the reactive voltage of the generator.
In the embodiment, firstly, a single field data section is taken as an example, an independent control method and a method are respectively adopted, and control effects under various control conditions are contrastively analyzed through continuous closed-loop control; in the experiment, the upper limit of a BJ station 500kV bus is 528kV, and the BJ station 500kV bus is recovered to be within a limit value range (527, 0) from the voltage of a ground state out-of-limit (529.0) through an independent control method; by the method, the BJ station 500kV bus is recovered to be within a limit value range (513, 0) from the voltage of the ground state out-of-limit (529.0); the system loss is shown in the table below.
Table 1: and (5) comparing the average network loss of the system with a table.
System loss of network all/MW Off-peak time/MW Peak hour/MW
Before control 892 634 942
Independent control method 864 613 926
Method for producing a composite material 836 602 883
It can be seen that the system network loss is obviously reduced after the control of the method, and the effect is better than that of an independent control method.
After interactive coordination optimization control among control centers is added, reactive power transmission of tie lines is reduced, and the specific conditions are shown in the following table.
Table 2: and a tie line reactive condition comparison table.
Reactive of tie line Total/Mvar Valley time period/Mvar Peak hour/Mvar
Before control 126 169 96
Independent control method 113 150 90
Method for producing a composite material 86 103 57
As can be seen from table two, after the two methods are used for control, although the reactive power of the whole network tie line is reduced, the reduction amount of the independent control method is not large; after the control is carried out by the method, the control targets of all the AVC systems of the control centers are kept consistent and the control processes are kept synchronous, so that the reactive power exchange among the control centers is obviously reduced.
Table 3: and comparing the voltage stability margin conditions.
Voltage stability margin all/MW Off-peak time/MW Peak hour/MW
Before control 16972 19276 14394
Independent control method 17212 19780 15463
Method for producing a composite material 18641 20971 16964
It can be seen from the above table that after the control of the method, the voltage stability margin is obviously increased, and the safety of the power grid system is improved.
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.

Claims (5)

1. A coordination control method of reactive voltage is characterized in that: comprises the steps of (a) preparing a substrate,
acquiring operation information Q of reactive voltage equipment at a distribution room side through a distribution transformer monitoring terminal, and uploading the operation information to a distribution network automation four-area master station through a mobile public network channel;
acquiring operation information P of reactive voltage equipment at a feeder side through a feeder automatic voltage reactive power control device, and uploading the operation information P to the distribution network automation four-area master station through the mobile public network channel;
calculating an optimized value of the bus voltage of the transformer substation based on the operation information Q and the operation information P;
calculating a reactive voltage optimization target value V of the feeder line based on data of all the transformer areas below the feeder line and by combining load prediction and comprehensive qualification rate of the transformer areas below the feeder line:
Figure FDA0003686621440000011
wherein beta is the comprehensive pass rate of the platform area voltage below the feeder line, s is the turning frequency, and Q is the reactive power;
designing a coordination controller according to the optimized value and the optimized target value of the reactive voltage
Figure FDA0003686621440000012
Wherein S (A, x) is the coordination controller, A is a block matrix, R is a positive definite matrix, x is input voltage, T is total reactive voltage monitoring time, T is a transposition symbol, U is a phase change matrix, and the phase change matrix is used for controlling the phase change of the input voltage and the reactive voltageaThe distribution network voltage qualification rate is obtained; the coordination controller satisfies that S (A, x) is less than or equal to x TQx; and carrying out coordination control on the reactive voltage according to the coordination controller.
2. A method for coordinated control of reactive voltage according to claim 1, characterized in that: the collecting of the operation information Q includes,
and the distribution transformer monitoring terminal acquires the operation information Q of the reactive voltage equipment at the transformer area side through a twisted pair and a DLT645 communication protocol.
3. A method for coordinated control of reactive voltage according to claim 2, characterized in that: the collecting of the operation information P includes,
and the feeder line automatic voltage reactive power control device acquires the operation information P of the reactive voltage equipment at the transformer area side through the twisted pair.
4. A method for coordinated control of reactive voltage according to claim 2 or 3, characterized in that: calculating an optimized value for the substation bus voltage includes,
based on the power distribution network data of the four-area master station, the load prediction and the distribution network voltage qualification rate are combined, and the optimized value U of the bus voltage of the transformer substation is calculated:
Figure FDA0003686621440000021
wherein, UjIs the actual voltage of bus node j, UaFor the distribution network voltage qualification rate, UjmaxFor maximum allowable deviation, n is the number of nodes.
5. A method for coordinated control of reactive voltages according to claim 1 or 3, characterized in that: the uploading of the operation information comprises that,
And encrypting the operation information through a safety encryption chip, and uploading the operation information through the mobile public network channel according to an IEC-104 standard communication protocol.
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105071399A (en) * 2015-08-26 2015-11-18 国网山东省电力公司 Voltage and reactive power coordinated control system based on interaction and coordination of primary and distributed networks
CN108988349A (en) * 2018-06-07 2018-12-11 国网江苏省电力有限公司淮安供电分公司 Power distribution network multi-layer reactive voltage control method containing distribution type renewable energy

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105071399A (en) * 2015-08-26 2015-11-18 国网山东省电力公司 Voltage and reactive power coordinated control system based on interaction and coordination of primary and distributed networks
CN108988349A (en) * 2018-06-07 2018-12-11 国网江苏省电力有限公司淮安供电分公司 Power distribution network multi-layer reactive voltage control method containing distribution type renewable energy

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